.banner {
    height: 200px;
    background: url(../img/CommodityTracking.png) center no-repeat;
}
.scanBtn {
    margin: 20px auto;
    max-width: 345px;
    height:45px;
    background:rgba(245,94,74,1);
    box-shadow:0px 3px 6px rgba(0,0,0,0.16);
    border-radius:25px;
    font-size:16px;
    font-weight:400;
    line-height:45px;
    color:rgba(255,255,255,1);
    text-align: center;
    cursor: pointer;
}